Rifle buttstock



FIG. 1 is a perspective view of our design;

FIG. 2 is a left side view thereof, the left and right sides being symmetric;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof. 

We claim the ornamental design for a rifle buttstock, as shown and described. 